Rotary duplicator



L. P. BOSC. ROTARY DUPLICATOR. APPLICATION mzn FEB. 26, 1920.

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mmwrae 100/; flax/H 5 50 LOUIS PHILIPPE BOSG, O15 PARIS, FRANCE.

ROTARY DUPLIGATOR.

Specification of Letters Patent.

Patented Aug". 16, 1921.

Application filed. February 26, 1920. Serial No. 361,555.

T 0 all whom it may concern:

Be it known that I, LOUIS PHILIPPE Boso, a citizen of the Republic of France, residing at Paris, No. 28 Rue Notre-Dame de Recouvrance, in the Republic of France, have invented certain new and useful Improvements in Rotary Duplicators, of which the following is a specification.

This invention consists in improvements applicable to all kinds of rotary duplicators in which stencils are employed, and the improvements consist more particularly in an apparatus designed to effect a uniform inking of the inner surface of the cylinder and removing therefrom all excess of ink, returning the excess ink into the ink-box and cleaning the cylinder after the copies have been made.

This apparatus improves the inking and also prevents the copies or the machine from becoming soiled as is often the case when the ink has been applied too abundantly at certain points.

The desired results are achieved by employing a brush acting against the inner surface of the cylinder on the farther side of the inking line.

The accompanying drawings illustrate by way of example two constructionalforms of an ink distributing apparatus according to this invention.

Figures 1 and 2 are respectively a side ele-' vation and a front elevation of the first constructional form.

Figs. 3 and i are similar views of the second constructional form.

Referring to Figs. 1 and 2, a is the rotary cylinder; 5 is a movable ink-box; 0 is a roller dipping in said ink-box; and cl is a roller for transmittingthe ink from the roller 0 to the cylinder at.

According to the present invention a brush 1 is carried by arms 2 in such a manner that the said brush bears against the inner surface of the cylinder on the farther side of the inking line which is constituted by the contact of this cylinder with the roller d.

The mount 3 of the brush has a section of the shape of a 7 and its ends are engaged freely in notches 4 formed in the ends of the arms 2. Along the edge of this mount situated by the side of a roller d there is arranged a slightly inclined gutter 5 which receives the excess ink stopped by the brush anddelivers it into a pipe 6 to be returned into the ink-box.

In Figs. 8 and i, the inking is efiected directly by the roller 0. In this case all contact between the roller 0 and the roller d is prevented. The brush 2 shown has a flat mount 3 which is fixed by means of bolts 7 and thumb nuts to a bracket 8 of inverted channel-shape. Between the mount and the bracket there is interposed a piece 9 of sheet metal so folded as to form an inclined plane which returns into ink-box the excess ink that has been stopped by the brush.

Whatever may be the means employed for supporting the brush, the latter, during the rotation of the cylinder a, rubs against the inner surface of the cylinder, and its bristles or hairs enter the holes in the cylinder and remove from some of the holes any excess ink which may be contained therein, and convey it into other holes which are insufiiciently supplied with ink so that the inking is rendered uniform and any excess of ink sliding along the brush is collected in the ink-box.

When the printing is stopped either temporarily or altogether, the inking roller is moved slightly away from the cylinder and the latter is continued to be rotated. The ink with which the cylinder and the backing sheet are still charged, will be gradually taken up by the brush until the backing sheet retains only that quantity of ink that is just necessary to prevent it from drying too quickly. In this manner all running of ink capable of soiling the copies or the ma chine is thus avoided.

The pressure of the brush against the cylinder can be regulated by any suitable means, such as springs, set screws, etc.

Olaims- 1. A duplicating device of the printing plate or stencil type, comprising the combination of a rotating cylinder, a roller for disposing the ink along a line upon the inner surface of the said cylinder, a brush disposed beyond the inking line for equalizing the ink applied by the said roller upon the inner surface of the said cylinder and for removing the excess of ink therefrom.

2. A duplicating device of the printing or stencil type, comprising the combination of a rotating cylinder, a roller for disposing the ink along a line upon the inner surface of the said cylinder, a brush disposed beyond the inking line for equalizing the ink applied by the said roller upon the inner surface of the said cylinder, an ink container, and an inclined trough situated adjacent the said brush and adapted to effect the return to the said ink container of the excess of ink removed by the said brush.

3. In a rotary duplicator of the stencil type, the combination of a rotary cylinder, means for applying ink along a line on the inner surface of said cylinder, a brush arranged to rub against the inner surface of said cylinder on the farther side of the ink ing line, an ink-box, an inclined gutter located near said brush and adapted to receive the excess ink removed by said brush, and a pipe leading from the gutter and discharging into the ink-box.

n testimony, that I claim the foregoing as my invention I have signed my name in presence of'a subscribing Witness.

LOUIS PHILIPPE BOSC. Witness:

MAURICE Room. 

